Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14..149p&link_type=abstract
Advances in Space Research, vol. 14, no. 4, p. (4)149-(4)152
Astronomy and Astrophysics
Astronomy
Coronal Loops, Energy Distribution, Mathematical Models, Plasma Heating, Solar Corona, Solar Flares, Flux Density, Satellite Observation, Solar Temperature, Spaceborne Astronomy
Scientific paper
It has been recently proposed that the solar corona is heated via the superposition of a large number of tiny energy-release events, the so-called nanoflares. In this paper we develop a simple semi-analytical model to describe the temporal evolution of the nanoflare plasma, confined in rigid magnetic flux tubes and subject to typical nanoflare energy releases. Assuming a power law for the nanoflare energy distribution and hypothesizing the repeated occurrence of nanoflares at random time intervals in an originally cool, low pressure loop, we show how a high temperature, high pressure plasma eventually builds up, leading to a nanoflare-heated corona. Even if the feasibility of the nanoflare mechanism as a coronal heating agent is thus demonstrated, we conclude by pointing out that present instrumentation cannot provide a definitive observational test of this hypothesis.
Kopp Roger A.
Poletto Giannina
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